State police on Thursday identified the couple as 35-year-old April Haskell and Christopher Ouellette, 28.

Law enforcement officials responded to a Main Street apartment after Ouellette called police to report that he had stabbed Haskell, said Stephen McCausland of the Maine Department of Public Safety. Ouellette and Haskell lived in the third-floor apartment with two children ages 2 and 4, McCausland said.

The children were in the apartment at the time of their mother's stabbing but were not hurt, McCausland said.

Trooper Barry Meserve, a 15-year veteran of the Maine State Police, shot and killed Ouellette, McCausland said. Information about what led to the shooting were not released. McCausland said Meserve was placed on administrative leave and the state Attorney General's Office will investigate the shooting.

McCausland said an autopsy on Ouellette's body will take place Thursday while an autopsy on the body of Haskell will be performed Friday.